Groundwater / Bore Hole Monitoring

Application Notes

Application Background                                                                                                                                                                          Printer Friendly Version

Groundwater depth measurements (often called bore hole monitoring) help in the management of the important groundwater resource on which we depend for many purposes. In particular groundwater resources may be used up through agriculture or mining operations.

Neon Bore Hole Telemetry Datalogger

Instruments can easily measure the amount of water that resides in our groundwater so we can manage the resource better
Measurements can deepen our understanding of the factors that influence groundwater recharge and lead to more effective management.

Application Detail

Groundwater depth is measured with a small diameter sensor deep in an observation bore hole. Water depth can be measured with a pressure sensor lowered down the bore hole and immersed in the water. This is call hydrostatic depth method.

Alternatively a standard float-and-pulley sensor system with a small (50mm or 100mm) float and a pulley at the top of the bore hole can also be used to measure depth.
The hydrostatic depth method is widely used as it is convenient to install, however all pressure sensors have some drift which needs to be considered. The float and pulley method is less convenient, especially is narrow diameter bore holes of 100mm, however it is very accurate and is not subject to drift.
Unidata offers the 6542D Hydrostatic Water Depth and Temperature Probe which uses the hydrostatic pressure of water to measure water depths in various environments.

These systems are typically installed in existing bores, perhaps with a diameter of 100 to 200 mm and a depth of 5 to 50 meters, with a bore head cap, often in a valve box/ enclosure or some other form of bore head arrangement

6542D Depth Probe

A data logger / RTU / NRT needs to be added at the top of the bore and data recorded and collected manually, or the data can be tele metered to a central location on a regular, perhaps 4 hourly basis.
There are generally two types of customer for these systems

  • A government authority which measures the groundwater levels for water table history generally
  • A mining or oil and gas company which has some mining or drilling activity in the area and has a need to ensure there is no change to the groundwater during their mining or drilling processes for compliance reasons
Neon Bore Hole Telemetry Module
6542D Depth Probe Mounting Options

The data collected can be then viewed and limit checked and alarms set in the event of a sudden change in the ground water level.

application note agricultural water tank monitoring 9

The data can then be passed to a statistical groundwater analysis software package for groundwater modeling purposes.

GROUNDWATER / BORE HOLE MONITORING

Unidata offers a tubular version of the Neon Remote Terminal, which can be inserted within the bore casing for convenience of installation.
The 2024F NBHTM terminal is designed as telemetry system for bore holes with diameters of 50mm or greater via 3G /NextG/ WCDMA/ and 2G GPRS cellular networks from any location within the cellular network coverage area. The tubular housing allows for easy insertion with
clearance in bores as small as 50mm diameter. There is also a simple magnetic reset switch, which allows the user to easily reset the unit in the field without opening it to the elements.

Neon Bore Hole Telemetry Module

Typical Configuration

Options for Application Specific Instruments / InputsUnidata Part NumberDescription
Hydrostatic Water Depth Probe6542D-XPT12 Pressure/Temperature Sensor SDI-12 3.5m, 10m or 20m
Hydrostatic Water Depth Probe - Titanium6542D-X-TTitanium PT12 Pressure/Temperature Sensor SDI-12 3.5m, 10m or 20m
Neon Bore Hole Telemetry Unit2024F-SQLSQL Neon Bore Hole Telemetry Module 3G with Antenna
Neon Bore Hole Telemetry Unit2024F-INSInsitu Neon Bore Hole Telemetry Module 3G with Antenna
Options for Neon Telemetry - NRT / RTU / Field UnitsUnidata Part NumberDescription
Cellular RTU 3G2013F-AB03Neon Metering Module 3G with Antenna and Li Battery
Cellular RTU 4G2013F-AB04Neon Metering Module 4G with Antenna and Li Battery
Cellular RTU 3G - Industrial2016F-AB03Neon Remote Terminal 3G with Antenna and Li Battery
Cellular RTU 4G - Industrial2016F-AB04Neon Remote Terminal 4G with Antenna and Li Battery
Low Earth Orbit Satellite Globalstar2015E-AB0Neon Remote Terminal - Satellite Globalstar Modem with Antenna and three Li Batteries
Ethernet2017E-0B0-1 or 3NRT Ethernet with single or triple Ethernet Ports
with three Li Batteries
Equatorial Orbit Satellite - Inmarsat2018E-AB0-1 or 3NRT Ethernet with single or triple Ethernet Ports
with three Li Batteries
LCD Display2500ENRT LCD Display
NRT Field Termination Strip2103F2015E,2016F,2017E, and 2018E NRT FTS
NRT Firmware Option2303A-8M8M Extended Memory Option
NRT Firmware Option2303A-8M-CAM8M Extended Memory & Serial Camera Option
NRT Firmware Option2303A-CAMSerial Camera Option
Options for Neon Application Software - Customer ServerUnidata Part NumberDescription
Neon Application Software2302ANeon Server Software Licence Incl 5 NAL
Neon Application Software2302A-10Additional 10 NRT Access Licences
Neon Application Software2302A-20Additional 20 NRT Access Licences
Neon Application Software2302A-50Additional 50 NRT Access Licences
Options for Neon Application Software - Unidata ServerUnidata Part NumberDescription
Neon Application Software2301ANeon Data Initial Subscription Setup Fee
Neon Hosting Service2301A-01Neon Data Service Fee for 1-50 NRTs
Neon Hosting Service2301A-02Neon Data Service Fee for 51-100 NRTs
Neon Hosting Service2301A-10Neon Data Service Fee Metering
Options for Conventional Dataloggers / Field UnitsUnidata Part NumberDescription
Standards Starlogger6004D-11Red Logger 512K with Alkaline Battery
Display Starlogger6004D-21Blue Logger 512K with LCD and Alkaline Battery
Prologger7001D-11Green Logger 1M with LCD and Alkaline Battery
Micrologger8010C-EURMicrologger 512K
Starlogger Field Termination Strip6103E6004D FTS
Prologger Field Termination Strip7100E7001D FTS
Starlog V4 Management Software6308A-AUEStarlog V4 Full Licence Key